Feed mechanism for metal-planing machines and the like.



G. H. BENZON, JR. FEED MECHANISM FOR METAL PLANING MACHINES AND THELIKE.

' APPLICATION FILED mm: 26,1907.

91 1,566. Patented Feb. 9, 1909.

v BY

. .Nrrn .sTAQ'rEsrATENT ornic.

GEORGE H. BENZON, JR, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO WILLIAMSELLERS & COMPANY, IN OORPORATED, OF PHILADELPHIA, PENNSYLVANIA, ACORPO- RATION OF PENNSYLVANIA.

FEED MECHANISM FOR METAL-PLANING MACHINES AND TILE LIKE.

Specification of Letters Patent.

Patented Feb. 9, 1909.

Application filed. June 26, 1907. Serial No. 380,842.

T 0 all whom it may concern:

Be it known that I, GEORGE H. BENzoN, a citizen of the United States,residing at Philadelphia, county of Philadelphia, and State ofPennsylvania, have invented a new and useful Improvementin FeedMechanism for Metal-Planing Machines and the Like, of which thefollowing is a full, clear, and exact description, reference being hadto the accompanying drawings, which form a part of this specification.

My invention has for its object to provide a feed motion for the toolhead of a machine having a reciprocatingmotion and an intermittent feed,such, for instance, as a metal planing machine, so arranged that theamount of feed may be adjusted at a point conveniently near the toolhead, in the case of a planing machine at the end of the cross rail. Iaccomplish this by means of a rack. I accomplish this in the followingmanner: The movable tool head is carriedby an adjustable slide. Iprovide a reciprocating rack having a movement of constant amplitude,acting to rotate a crank disk carried by said slide, and which crankdisk is capable of being adjusted to have a throw corresponding to thedesired movement of the tool head by means of a crank pin adjustedthereon. This crank pin is connected to the usual feed screw or feed rodby which a rotary movement of any desired amount or in any desireddirection is imparted to the feed screw or feed rod and thus to the toolhead and tool. This and the details of construction hereinafterdescribed form my invention. A

I will first describe/the embodiment of my invention as illustrated inthe accompanying drawings and then point outthe invention in the claims.

In the drawings my invention is shown as embodied in a metal planingmachine.

In the drawings; Figure l is a side view of a machine embodying myinvention. Fig. 2 is a detail View showing slotted crank disk. Fig. 3 isa detail section of same on line 3-3. Fig. 2. Fig. 4 is an enlarged viewof one of the ratchet boxes broken away to show pawl.

a is one of the housings, b the cross rail which is mounted in the usualmanner, so as to move vertically upon the cross heads. a the tool headmounted upon the feed screws or rods cl, carried by the cross rail 6,so, that by turning the rods, the tool head will be moved and the feedadjusted. These rods or screws are rotated by means of pawls e, in theratchet boxes j, which pawls act, in either direction to rotate the feedscrews or rods, in one direction by driving and, in the other direction,by taking up. 'I'hese ratchet boxes f are engaged by a segmental gear 9mounted on the end of lever 12, pivoted to the cross rail. This lever his coupled, by a connecting rod 2', with the crank pin j, adjustable ina slot is, in the crank disk Z. This crank disk Z is carried by a flange7n, keyed to one end of shaft it. The crank disk l is made separate fromflange m and secured to itby clamps 0 drawn up by bolts 2. The shaft'21- is carried by a stand 9 on the rear of the cross rail. On the endof the shaft n, opposite to that of the flange m, is the pinion rengaging with the rack bar 8. This rack bar 8 is carried in guides 25 onthe housing a and counter-balanced by the lever u and weight w. Thisrack bar is moved up or down by a crank w. This crank as may beoperated, by any well known mechanism, at each reversal of the table y,which moves back and forth, in the well known manner, upon the bed 2.

The throw of the rack bar 8 is of such extent as to produce not overone-half of a revolution of the pinion 1", which pinion 1',

through the mechanism. described, will ro tate the feed screw or rod andthus move the tool head. By adjusting the crank pin j in the slot is theextent of movement of the feed screws or rods may be varied and thedesired amount of feed obtained.

In raising or lowering the cross rail, the position of the crank slot,which controls the throw of the segmental gear, may be changed so as torequire readjustment in the new position of the cross rail. I accomplishthis readjustment in the following manner: WVhen the cross rail issecured in the new position, the bolts 79 are released and the crankdisk rotated until the slot is vertical or until a mark 1 on the crankdisk is brought opposite a corresponding mark 2, which is carried on aprojection 3 from the stand I The bolts 79 are then secured and thecrank pin 3' is. moved in the slot is to the proper point for thedesired throw or movement of segmental gear 9. The feed will take placeat the end or beginning of a Workingstroke, dependent upon Whether thecrank pin j is set, at starting above or below the center of the shaft91.

Having now fully described my invention, What I claim and desire toprotect by Letters Patent is:

1. In machines of the character described, a movable tool head carriedupon an adjustable slide, a reciprocating rack having a movement ofconstant amplitude, a crank disk carried by said slide, a crank pinadjustable thereon, means to rotate said crank disk from the said rack,a connection between said crank pin and said tool head; whereby, in themovement of said crank disk said tool head is moved on the slide and theextent of said movement may be varied.

2. In machines of the character described, in combination a movable toolhead carried upon an adjustable slide, a reciprocating rack, a shaft, acrank disk carried upon said slide and mounted so as to be rotatable onthe axis of said shaft, means to secure said crank disk to move withsaid shaft, a crank pin adjustable upon said crank disk, means to drivesaid shaft and connection between said crank pin and said tool head.

In testimony of which invention, l have hereunto set my hand, atPhiladelphia, on this 21st day of June, 1907.

GEORGE H, BENZON, JR.

Witnesses:

M. M. HAMILTON, A. M. UnLiN.

